Cycle



P. ZUCKER' Jane 14, 1936.

CYCLE Filed Feb. 28, 1955' Patented J an. 14, 1936 UNITED STATES PATENTOFFICE Application February 28, 1935, Serial No. 8,767 In SwitzerlandDecember 18, 1933 7 Claims.

This invention relates to cycle frames and has for its object to provideimprovements therein.

In some cases the cycle tyre pumps have hitherto formed a separateaccessory and have been detachably connected to the. frame tubing, forexample by means of spring clips.

In another instance the pump has been pivotally attached to the lowerpart of the seat tube by means of a tube clip and could be swung outfrom the top. In this case the pump had only to be swung out andconnected to the tyre tube requiring inflation by means of the flexibleconnector tubing to be ready for operation.

It has also been proposed to provide cycle tyre pumps combined with theframe, but these are difiicult to operate.

These means did not prevent theft and loss of the pump on the way.

In the arrangement according to the inven- 1 tion these difficulties areeliminated.

According to. the invention the cycle frame which has combined therewitha tyre pump is provided with a slot adapted to guide the pump handle.

In the attached drawing various embodiments of the invention areillustrated by way of example.

Fig. 1 illustrates part of the pump according to one embodiment partlyin elevation and partly in section, portions of a cycle necessary forthe understanding of the invention being also shown.

Fig. 2 is a longitudinal sectional view taken on the line 11-29 of Fig.1.

Fig. 3 shows a detail in elevation and inverted plan View.

Referring to Figs. 1 to 3 of the drawing, I indicates the seat tube and2 the adjoining portions of the back stays at the top and of the chainstays at the bottom of the cycle frame. The seat tube forms the cylinderfor a plunger 3 the plunger rod of which is replaced by a tube lterminating in a head piece 5. The diameter of the tube l substantiallycorresponds to the inner diameter of the seat tube, so that the members3, d and 5 form a firmly guided sliding assembly. The head piece 5 isprovided with a transverse passage 1 communicating with a guide slot 6of the seat tube, an opening 8 being provided in the bottom of saidpassage 1. Wound around a pin 9 disposed underneath the passage 1 thereis a coil spring it which has an arcuate portion extending into saidopening 8 in the passage bottom and terminating in a loop. This loopprojects through a longitudinal slot H in the tube 4 and presses againstthe inner face of the seat tube, while the ends of the spring aresupported by the tube 4. The tension of the spring is such that it iscapable of arresting the aforesaid sliding assembly at any point in theseat tube, while when the base of an operating handle is inserted intothe'passage l, as described later, said base depresses that portion ofspring l0 which extends through the opening 8, thereby withdrawing thelooped end of said spring from the inner face of the seat tube I, sothat the aforesaid sliding assembly is free to slide in the seat tubefor the pumping operation. Owing to this arrangement in its uppermostarrested position determined by the guide slot in the seat tube thesliding assembly covers said slot and prevents the ingress. of dust andother foreign bodies through the slot 6.

In order that the difficult and lengthy operation of inserting andfixing the bottom in the seat tube may be avoided, a bottom formed of arubber disc t2 armoured on both sides with metal discs is utilized. Bycontracting the metal plates with the aid of a bolt and nut connectionHi the diameter of the rubber disc is increased and its circumferencecaused to be applied under pressure against the inner face of the tube,whereby the said bottom is secured in position. The seat tube bottom soformed is capable of resisting the pressure of the column of air formedduring the operation of the pump, so that the whole amount of the airmay pass through the air discharge opening l4 provided for this purposeinto the attached flexible transfer tube leading to the tyre tube. Thisbottom is easily fitted into any type of existing cycle.

The sliding assembly 3, 4, 5 is operated by a separate handle I5 whichhas a flat extension 55 adapted to be introduced into the passage 7 ofthe tube 4. To assure the antifrictional sliding of the handle along theslot 5 a ball 18 is loosely inserted into said flat handle extension atthe point where it registers with the edges of the slot, said ballslightly projecting on either side from the broad-side of the flatextension. The grip I? of the handle is hollow and adapted to be closedby the screw on lid I9. The chamber thus formed may be utilized forholding repair outfits. The handle itself may be carried in the tool bagof the cycle.

What I claim is:

1. In a cycle, a pump connected with the cycle frame, a seat tubeforming a cylinder for the plunger of the pump, a guide slot provided insaid seat tube, this tube having an air discharge opening, a tubeforming the plunger of the pump and having a passage communicating withsaid guide slot, a separate pump handle having a base, the said passagebeing adapted to receive said base, and means for anchoring the plungertube in the seat tube.

2. In a cycle, a plunger pump connected with the cycle frame, a seattube forming a cylinder for the plunger of the pump, a. guide slotprovided in said seat tube, this tube having an air discharge opening, atube forming the plunger of the pump and having a passage communicatingwith said guide slot, a separate pump handle having a base, said passagebeing adapted to receive said base, means for anchoring the plunger tubein the seat tube, said means comprising a coil spring wound on a pinunderneath the passage, said passage having a bottom, one end portion ofsaid spring projecting partly through the bottom of the passage,pressing against the inner face of the seat tube through a slot in theplunger tube, the other end portion of said spring being supported bythe inner face of said plunger tube, in such manner that when the handlebase is inserted into the passage the projecting end portion of thespring is depressed and thereby removed from the inner face of the seattube, the, plunger tube thus being rendered slidable.

3. A cycle pump comprising, a tube of the cycle frame constituting apump cylinder, at plunger tube substantially fitting and capable ofreciprocation Within the cylinder, the cylinder being formed with aguide slot and an air discharge opening, the plunger having a passagetherethrough adjacent one end, a handle traversing the slot and havingits end portion disposed in the passage.

4. A cycle pump comprising, a tube of the cycle frame constituting apump cylinder and formed with a guide slot and an air discharge opening,a plunger tube substantially fitting and reciprocal within the cylinder,a transverse passage formed in the plunger adjacent one ofv its ends, ahandle fitting within the passage and extending outwardly through theslot, and spring means carried by the plunger whereby when the handle isinserted within the passage the plunger is free to move in the cylinderbut with the handle removed relative movement of the cylinder andplunger is prevented by the spring means.

5. A cycle pump comprising, a portion of the cycle frame constituting apump cylinder and formed with a guide slot and an air discharge opening,a plunger reciprocal within the cylinder, a passage formed in theplunger adjacent one of its ends, a handle fitting within the passageand extending outwardly through the slot, and spring means disposedwithin the plunger and operating therethrough for preventing relativemovement of the plunger and cylinder when the handle is removed.

6. In a cycle pump, a cylinder forming a part of the cycle frame, aplunger tube reciprocal within the cylinder, and a spring disposedwithin the tube and normally having a portion projecting from the tubeto engage the interior of the cylinder to prevent relative movement ofthe cylinder and plunger.

7. In a cycle pump, a cylinder forming a part of the cycle frame formedwith a guide slot and an air discharge opening, a plunger tubereciprocal within the cylinder and formed adjacent one of its ends witha passage, a handle fitting within the passage and extending through theslot, and a spring disposed in the tube and normally projecting into thepassage and engaging the inner wall of the cylinder, said spring beingmovable out of the passage and out of engagement with the cylinder uponmovement of the handle into the passage.

PHILIPP ZUCKER.

